I don’t think is only the defense is the main problem of Barcelona, the entirely team have their own their problems and that’s why their performance is going in that way; since their try their much effort and able to claim the top of standing this is the right time for them to maintain their points and keep their mentality so strong, but their still fuck up by allowed a team like Atlético Madrid leading them to a drew in their last match. Which was very disappointment from them, because even me I wasn’t expecting that kind of performing from them.
Why we must blame Barcelona defense? In the latest match, both center backs scored goals although they were conceded 4 goals. This proved that Barcelona defenders were good, they could scored goals also. If they were easily conceded goals, the problem may be in the midfield line and the tactics. Also, the attackers of Barcelona were not quite productive, the goal come from the attackers only made by Lewandowski. And Lewandowski played from the bench. So, it is actually quite complicated problems for the all lines. I also think the tactic has the contribution for the problem. Flick looks like not applying too high pressing in the match.